| Summary: | 碩士 === 國立臺北科技大學 === 化學工程與生物科技系化學工程碩士班 === 107 === Part 1
Methyl paraoxon (MOX) is a highly toxic organophosphate pesticide. It is recently reported that, MOX can enter the human body through ingestion, inhalation, or by dermal penetration. Due to its high non-degradability, it can bind to the tissues of fruits and vegetables. When it is consumed, it can imposes sub-chronic and chronic diseases, by the inhibition of acetylcholinesterase in human metabolism. Therefore, for the first time, we reported a detection of non-enzymatic electrochemical sensor based on 3D porous phase graphene oxide sheets encapsulated chalcopyrite (GOS@CuFeS2) nanocomposite. Hence, the development of reliable sensors for the real-time detection of pesticides is imperative to overcome practical limitations encountered in conventional methodologies. As synthesized GOS@CuFeS2 nanocomposite film screen-printed carbon modified electrode (SPCE) displays excellent electrocatalytic ability towards MOX. Under optimized working conditions, the modified electrode provides linear response range from 0.073 to 801.5 μM. The detection limit was obtained as 4.5 nM. The sensor displayed outstanding sensitivity as 17.97 µA µM–1 cm–2. This composite could be a promising electrode modifier for electrocatalysis. Finally, the GOS@CuFeS2 nanocomposite modified electrode shows greater real-time practicality in vegetable real samples. The obtained moral parameters from the developed method were compared with the authenticated HPLC results.
Part 2
At present, B/N co-doped mesoporous carbon (BNDC) have been synthesized in one-step and employed for high sensitive electrochemical detection of Isoniazid (INZ). The synthetic procedure was simple and produced homogenous doping of heteroatoms with high elemental purity, and mesoporous surface. Further, the surface and physiochemical properties of synthesized BNDC was analysis by Nitrogen (N2) adsorption-desorption analysis, and spectroscopic studies. A high sensitive amperometric sensor of BNDC film modified electrode, towards INZ, delivered superior analytical performance with a broad dynamic range 0.02–1783 µM and detection limit of 1.5 nM. Excellency of electrochemical sensor can be attributed to the large surface area, low pore size, abundant active sites, and enhanced electrical conductivity of synthesized BNDC electrocatalyst. Furthermore, the excellent chemical stability of BNDC advocate the long-term stability and reproducibility of the fabricated electrochemical assay. The practical applicability of the proposed sensor was assessed by detection of INZ in physiological fluids.
Part 3
The world’s largest aluminium producer has publicized that will blockout aluminum production all over the country from November 2018 to March 2019, in order to minimize winter air pollution. Presumably, these sort of reports urge the chemists to perceive that recovery or recycle of aluminum is decisive. In this article, our group has recovered aluminium oxide nanoparticles (Al2O3 NPs) through a facile one-step sonochemical methodology. The morphological details of Al2O3 NPs were examined by FE-SEM and TEM; finally, the purity of as-recovered Al2O3 NPs were confirmed by XPS and XRD. The as-recovered Al2O3 NPs were employed for the specific and sensitive detection of omeprazole (OMZ), which comes under the class of proton-pump inhibitor. Under the well-optimized conditions, the graphically plotted calibration curve was attained at Al2O3 NPs/GCE towards the detection of OMZ, which possesses the wider linear range of 0.025-433.3 µM, with the minimal detection limit of 9.1 nM. Furthermore, the recovered material was employed as an active participant in supercapacitor application, which exhibited an appreciable specific capacitance value (688 F/g) at 1 A/g current density in 1 M KOH and maintained 86% capacitance retention even after 3000 GCD cycles.
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